Madam Chair, it's a very interesting question. We do not have current studies on that. I know there have been studies that have been undertaken in the past. We can certainly get back to the committee with that information.
I would also note, for example, that you mentioned hydrogen, and there are carbon emissions. There are carbon emissions in any manufacturing facility, but there we're talking about, for example, facilities where you would spread the carbon emissions of building that facility over the life of the facility. These are facilities whose lives are not measured in years or decades. We have facilities that are more than a century old that are continuing to operate today. When you calculate what the carbon emissions are of rebar and concrete, for example, in a hydro facility, you then have to spread that out over the life of that facility, which is multi-generational.